Refractory covering for metal pipes or tubes.



J. HARRINGTON.

REFRACTORY COVERING FOR METAL PIPES 0R TUBES.

APPLICATION FILED DBO. a1, 1910.

Patented July 4, 1911.

inafter described UNITED STATES PATENT OFFICE.

JOSEIiIHARRINGTON, ormvsnsmn, rumors.

REFRACTORY covnnmo ron METAL PIPES on prunes To all whom it may concern:

Be it known that I, JOSEPH HARRINGTON, a citizen of the United States, and a resident of Riverside, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Refractory Gov-- ering for Metal Pipes or Tubes; and I do hereby declare that the following is a full,

clear, and exact description thereof, reference being had to the accom anying drawings, and to the letters of refsrence marked thereon, which form a part of this specification. I

This invention relates to improvements in refractory coverings for metal tubes, such as are used for protecting the water tubes of boilers where exposed to the heat in the interior of .a furnace, or for protecting other metal tubes exposed to heat.

The invention relates more particularly to that class of such refractory coverings in which the same consists of a plurality of fire-brick or tile sections adapted to fit upon and completely surround or inclose the metal tube to which the covering is applied.

The invention consists in the matters herepended claims.

A refractory covering embodying my invention embraces in general a plurality of fire-brick or tile sections, each of which is made of such cross-sectional form as to fit upon and cover-a part of the circumference of the tube, and which is adapted for contact of its lateral faces with one or more like sections, and in connection with the same to completely inclose or cover the tube. Each of such sections is, moreover, provided with endwise extending, locking lugs adapted for interlocking engagement with correspondingly shaped recesses in adjacent sections, in

such manner as to prevent lateral separation of the sections, and thereby retain the same in place on the tube. In the particular form of the invention shown in the accompanying drawings the sections are arranged in two or more sets, with the section of each set in endwise alinement with each other, and the position to break joints with the section of an adjacent set, while the locking lugs are formed on the ends of lateral extensions of each section, as will hereinafter more fully appear. I

s shown in the accompanying drawingsz-Figure 1 is a perspective view showing a metal tube with a plurality of fire.-

I Specification of Letters Patent. Application filed December 31, 1910. Serial No.

and pointed out in the ap- Patented July 4, 1911. 600,228.

brick or tilesections applied thereto. Fig. 2 1s a plan view of the same. Fig. 3 is a cross-section taken upon line 33 of Fig. 2. Flg. 4; 1s a perspective view showing a modifie construction in the interlocking parts of the fire-brick or tile, especially adapted for vertical tubes. Fig. 5 is a sectional view taken uponline 55 of Fig. 4.

As illustrated in said drawings, A indicates a'metal tube which may be one of the water tubes of a steam boiler. In Figs. 1, 2 and 3 said tube is shown as arranged horizontally, While in Figs. 4 and 5 it is shown as arranged vertically.

B, B, B indicate fire-brick or tile sections which constitute the refractory covering'for the tube A. Each of said sections B 18, in general, as to cover a partof the circumference of the tube, and to serve in connection withone or more similar sections to completely cover or inclose the same. Said sections are arranged in two'sets, each of which is applied to, or covers one-half or side of the tube, and each set consists of a plurality of the sections arranged end to end, or in longitudinal alinement with each other. The sections of one set are connected with those of the other set by means of a lateral projection B on each section, having at its endslocking lugs b, b which extend in an endwise direction from the ends of the ,said projections, and are so arranged as to be brought into engagement or interlocking relation with like lugs on two of the sections by the other set, by endwise movement of the sections relatively to each other.

The construction shown in Figs. 1, 2 and 3 is designed more especially for horizontally disposed tubes and in this construction the covering sections have interlocking connection at their meeting faces above, or atv the top of the tube, only. A The construction shown in Figs. 4 and 5 is designed more especially for vertically disposed tubes; 1n this instance the sections are interlocked with,

each other at both sides of the tube.

As shown in Figs. 1, 2 and 3, the lateral projection B on each covering section is located above the tube, and the said projection B has its out or dove-tail form, so as to form the vertically extending locking lugs b, 25, and correspondingly shaped notches or recesses at each end of the projection. Said lateral projections B on all of the sections are alike end margins made of under-' made of such cross-sectional form and are so arranged or proportioned as to 1 give interfitting relationof the locking lugsw i The sections B, B are so arranged that the meeting ends of two sections at one side of the tube come opposite the middle of a section at the opposite side of the tube. The projections B are arranged centrally between the ends of the sections, .and the ends of the said projections are located at a disv tance' from the end faces of the sections equal to one-half of the length of the projection. As a result of this construction, all of the sections may, be made alike and may be applied to either-side of thetube, those at opposite sides of the tube being reversed in position or turned end for end. I I

As shown in Figs. 1, 2 and 3, the faces of the sections which meet each other below the tube are flat and are arranged in the vertical plane passing through the center of the tube, so that the sections on both sides of the tube are exactly alike in form and dimensions. The lower margins of the sections may, however, be arranged as shown in an application, Serial Number 487,630, filed April 3rd, 1909, byv myself and Herman A. Poppenhusen, with the disadvantage, however, that the sections for the two sides of the tube are different in cross-sectional form, and rights and lefts must be provided.

Thesections made in the manner described are applied to the tube in the manner illustrated in Fig. 2, each section added at one side of the tube being placed against the tube. and slid endwise along the same until the lug or flange b is brought into proper engagement with the like lug or flange on a section previously applied to the otherside of the tube.

In the construction shown in Figs. 4 and 5, it; is like that hereinbefore described except that in this instance the projections B are duplicated on the meeting margins of the sections at both sides of the tube, so that said sections are positively interlocked with each other and cannot be removed laterallyexcept by moving or shifting the sections separately in a direction lengthwise of the tube. 1

It will of course be understood that in the construction shown in; Figs. 1, 2 and 3, the sections on opposite sides of the horizontal tube are likewise positively interlocked with each other above the tube, in a manner preventing them from being separated laterally, although, in this instance, as the action of gravity tends to hold the opposite sections in contact with each other at their lower meeting margins, it is unnecessary to provide on the sections any interlocking arts below the tube. The covering sections illustrated are so shaped as to be octagonal in exterior conformation, but in practice they ma be of any other desired external form.

It is to be understood that interlocking covering sections embracing the general features of construction above described and hereinafter claimed may be variously modified with respect to their specific details of construction and I do not, therefore, desire to'be limited to the particular construction illustrated in the accompanying drawin s, except so far as the same may form the su ject of specific claims.

I claim as my invention 1. The combination with a metal tube, of

' a refractory covering consisting of a plurality of sections each provided with two endwise projecting locking lugs adapted for interlocking engagement with like lugs on adjacent sections'to hold the sections from lateral separation.

2. The combination with a metal tube, of a refractory covering consisting of a plurality of'sections each provided with a lateral projection having at its ends endwise projecting locking lugs and correspondingly shaped notches, adapted for interlocking engagement with like lugs and recesses on laterally adjacent sections to hold the sections from lateral separation.

3. The combination with a metal tube, of a refractory covering therefor, consisting of a plurality of sections arranged in a plurality of sets, with the sections constituting each set in end to end relation, each L t-ance from the ends of the section equal to one-half the length of the projections.

In testimony that I claim the foregoing as my invention I affix my signature in the presence of two witnesses, this 27th day of December, 'A. D. 1910.

JOSEPH HARRINGTON.

Witnesses:

T. A. MARSH, G. R. WILKINS. 

